Fix refactoring error

.gitignore

@@ -10,3 +10,5 @@
 
 # Output of the go coverage tool, specifically when used with LiteIDE
 *.out
+
+aws-hostname

Makefile

@@ -0,0 +1,6 @@
+export GOOS=linux
+
+BIN=aws-hostname
+
+$(BIN): main.go
+	go build -o $(BIN) main.go

main.go

@@ -46,7 +46,24 @@ func main() {
 	}
 
 	if setEc2Tag {
-		writeTag(identity.InstanceID, "Name", *hostname)
+		svc := ec2.New(session.New())
+
+		input := &ec2.CreateTagsInput{
+			Resources: []*string{
+				aws.String(identity.InstanceID),
+			},
+			Tags: []*ec2.Tag{
+				{
+					Key:   aws.String("Name"),
+					Value: aws.String(*hostname),
+				},
+			},
+		}
+
+		_, err := svc.CreateTags(input)
+		if err != nil {
+			log.Fatal(err)
+		}
 	}
 
 	if setHostname {